Temperature-indicating device for ccoling systems for internalcombustion engines



FFICR pplieaten filer?. october l.

.To @El "wl/wm i? may concern Be it known that l, LOUIS xlizoirson, e citizen oi the United States, end resident oi Newark, in the countyoil Essex of New Jersey', have invented certain new enduseiul improvements in Temperature indicating` evioes for Cooling Sysuems for lnternal-Combustion Engines, of Wliicli the following is e. specilicntion.

The invention .relates to tempera ture indi cating-n'ieens for tlie Water cooling systems of internal combustion engines, especially es employed in 'connection Wish automobiles, und more particularly to ineens of this clim- :icter in which tlie ectnal temperature con@ tion of the cfoiing Wet-er is to be indi eted., it will be appreciated that in order to reeeli cooling water, the neet responsiw nient innst extend Well Within tlie tank oi' the automobile radiator, and it is tlf jectoi tlie 'yresent invention 'to provide means whereby this may ee convenientlQ and readily eccornpiislied and the exposed end of seid element readily eccoinniodeted to the particular character of seid tenir, While et the seme time retaining the usuel transperent outer indicator portion of seid element. in my eonending application Serial No.,

126193:' (new U. newer etent le. '13063;6 oi Jene l0, li siiewn descriled e eiiniier errenggeinent; lint no oluin therein is roede to this feature,

the Accompanying vdrWings which illustrate the invention-- 1 '1 il l. "ro -teievetion o1 tn Le ture indie ting device and radin. rcs-n Fig. 3 is e .fertieel section tlieretiironli teken on the 5m-3, 9.

Similar onere-eters or reference designate corresponding parte throughout t'ne several Views.

Referring to the drawings, designates i tlie radiator, or vrntlier the ripper 'ta-nir non tion tliereoff, which is generally provided 'with e. cylindrical lilling opening1 11 through which tlie Waiter of tiie radiator oe replenished, said opening losing normally closed by e, snit-able oep 12 arranged to be screwed thereon. The een 12 is designed, furthermore, to carry tlie ter" ieting device, einen, Sile QllD l ,l

persi ,tubular member 13 consists ieitented July 2), 1920,

Serial No, 125,156.

Aconsists of e tubular member edeptednto ret-iin e suitable liquid 1 3", for example e, solution of e cobalt salt in Water, .which solution will undergo e change in color over e certain range o' temperature ,and reverting to seme when the originel temperature is restored.. No claim, however, is made to this feature in the present application. The said two portions; and the outer or indicating` portion 1%, which is elE glass or other transparent material, may be mounted in e suitable protectingr freine 15. The seid portion Llis closed et the top end its lower end connects with e. portion 14 Wliicl'l. is of e iiexible material, preferably metal, the saine being screwed into the open end el? portion 'i3 and closed et its lower end. "ilie junction is sealed es by'snrrounding it with short piece oi rubber tubing 16, and ri-bont iyliie'n is located e short length of nietzil tubing or bushing 17, externally threaded for Connection of seid temperature responsive member its freine 15, or rather 17 is closed to the extension 14 by ineens of solder or cement so that a rigid and substentiel joint is provided. The portion 14 of the tubular member, closed et its lower end., this -lorniing e compound member, is mede of sncii length es to ne caused to extend Well below tlie normal water level so es to 1oe et all times snbn'iersed in tiie Water of the tank, or to lie directly tlie path of the Water issu. ing troni e moreover., ne to its flexibility, may be eccornmeal;tfl various types of radiator miel eben once properly placed there in, may be e ely removed and replaced, es hereinafter set ortli.

ln order to allow of relative motion be tween seid oep end tlieiranie 15 With con tained temperature responsive device, as in nnseretving tlie een when desiring to replenisli tiie water in the tenir, the underfaee ot tlie enlargement or bese 18 oi said :treme is ded with e. downwardly extending pin -ieli is adapted to engage in a. suitable socket 2l provided therefor in the top of the carp 1'2. To secure the two members against reitle and disloflgnent, a spring 22 is interposed bet-Ween the underfece oi carp 12 and a nir; or nuts 23 screwed upon the lower end the bushing 1'?, Villien it is desired to nnscrew tlie cap 1.2; it is necessary merely to the enlargement 1.8 to disenG-ege its pin tit l.

return pipe 19. Seid portieri,-

2O from said cap and rotate the'latter, Whereupon the entire temperature indicator and cap maybe free access opening l1. heatresponsive turned toits proper position in the tank,v

for example, as shown in Fig. l and the cap screwed into place.

l claim:v i

' l. A heat responsive element -for insertion through an automobile radiator. Cap, and consisting of a Compound tubular member containing a heat responsive liquid Capa ble of automatically changing its normal color to an abnormal one simultaneously when the normal conditions or' the engine become abnormal, the said member having a transparent indicator portion for said liquid projecting above the radiator Cap land a oontinuation thereof of flexible material.

2. A heat responsive element for insertion through an automobile radiator Cap, and consisting oli. a compound tubular member containing a heat rsponsivo liquid capable of automatically changing its normal color to an abnormal one simultaneously when the normal conditions of the engine become abnormal, the said member having a glass inclioator portieri for said liquid projecting above the radiator Cap and a continuation thereof olf llexible material.

3. A heat responsive element for insertion through an automobile .radiator cap, and gon? sisting; of a' fnnponnd tubular member tontaining a heat responsive liquid capable of automatically changing its normal color to an abnormal one simultaneously When the normal conditions oi' the engine lbecome abnormal, the said member having'a transparent rigid indicator portion for said liquid projecting above the radiatoroap and a continuation thereof adapted to be bent into position to bring its outer end into direct oontact with the lluid issuing from the radiator.

return pipe* and .means secured to the other end whereby the said heat responsive element may be attached to the radiator cap.

Signed at Newark, in the county of Essex and State of New Jersey this 13th day of OC- l aber, n. n. wie.

Lonis v. Bonson 

